This is a good game that in my opinion lacks a handful of things that would make it incredible.
First of all, this game does a lot of things well, the art style is really great, having a day system to track progress is awesome, and the 'sell all' button is a great QoL feature.
My main issue is that there doesn't seem to be much incentive to engage with the game's systems. It's cool that it has a shop, but why is it needed? You can dig every grave in the level without it. You have enemies to fight, but why bother if you can just run around them? There's a timer tracking how long you've been in the 'game' part of the game, but why? You're probably only going to be there for a minute.
This game desperately needs better progression, since that would tie everything together. There needs to be a reason to stay in levels longer, or explore further. Maybe levels could be larger and randomized? Or there could be more or harder enemies the longer you stay in a level?
As it stands the game is fantastic on the first run, but provides no real reason to keep going despite asking the player to do so.
I really hope this doesn't come off as harsh. I do think the game is good, but I also think whatever you make next could be so much better.